"Automotive coolant refractometer measures the freezing point of coolants plus battery charge condition. Requires only a few drops of solution to use. Measures the freezing point of coolants Measures battery charge condition Provides accurate and repeatable measurements of ethylene glycol and propylene glycol and F on easy to read scale Propylene range -60F 63 to 32F 12 Glycol range -60F 59 to 25F 16 Specific gravity of battery acid 1.15 to 1.30 Automatic temperature compensation Requires only 2 to 3 drops of solution Prism and lens with a simple focus adjustment provides repeatable results Includes calibration screwdriver, calibration solution and case Model RF40 1-year limited warranty"
Average Customer Rating:
(2 Reviews) 2
Rating Summary(2 reviews)
2 of 2(100%)would recommend this product to a friend.
Customer Reviews for Extech Battery Coolant/Glycol Refractometer - Model# RF40
Review 1 for Extech Battery Coolant/Glycol Refractometer - Model# RF40
great to have as a tech
February 4, 2014
"i bought this to use on all of our trucks/equipment. it works great and comes in handy when you want to keep your equipment running with good coolant. great buy!"
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Review 2 for Extech Battery Coolant/Glycol Refractometer - Model# RF40
Easy, Fast & Accurate
March 6, 2007
from San Diego, CA
"Correct coolant mixtures are important to me for boil-over protection when I'm wheeling my jeep in the Southwest desert's 100+ degree F. temperatures. Old fashion hygrometers are not that accurate and ineffective on propoleneglycol type coolants. This is where the Extech Battery Coolant/Glycol Refractometer really shines, it will test ALL types of coolant/antifreezes. All you have to do is calibrate with a couple drops of distilled water, wipe it off, add a couple drops of coolant and take the reading. Easy, fast and accurate. Additionally, you can also check the charge of your automotive battery by reading the specific gravity of the battery acid. Two tools in one and a handy storage case to boot! Well worth the investment."